1. Harley, D., Slade, R., Gattiker, U.E.: Viruses Revealed. Osborne/McGraw-Hill, Berkeley (2001)
2. Chen, T.M.: Internet Protocol J. 6, 4 (2003)
3. Yorke, J.A., Hethcote, H.W., Nold, A.: Sex. Transm. Dis. 5, 51 (1978)
4. Anderson, R.M., May, R.M.: Infectious Diseases of Humans. Oxford University Press, New York (1991)
5. Brookmeyer, R., Gail, M.H.: AIDS Epidemiology: A Quantitative Approach. Oxford University Press, New York (1994)